Document XOJ7QpoXGx8YOM3NOQ8Qqmv8w

M. A. F o r c e 3 ~ I " "7^ FC-143 Objective: Determine the fate of FC-143 in the Teflon process. Status : 90% of FC-143 is absorbed on or incorporated in Teflon. FC-143 is probably decomposed in sintering. Tightly bound FC-143 goes to the customer in I product. Air samples taken at SM-3 and I process show FC-143 to be < 50 ppb in operator breathing zone. 000C04 SPR000555 EID714467 FC-143 DATA 2200 PPM ADDED TO DISPERSION PP&R Samples Supernatant Liquid Raw Dispersion - 35% Solids Concentrated Dispersion H2O Control PPM Level of FC-143 in _____ Liquid Phase 220 125 180 3000 Teilori8 Process Wash Reel Water Regeneration Bath 50 Not Detectable Air Samples Roll 2 Roll 11 Roll 15 Operations Desk Induction Dryer Exit Above Induction Dryer Approximate Temp. F 250 690 - 700 680 - 700 75 Level of FC-^143 ppb < 50 NOTE: Air samples were taken 18 inches from the face of the machine and 5 feet high. 000005 SPR000556 EID714468 FIGURE I 'ash Reel 167 g. H20 per g. Yarn FIGURE 2 "I'1 YARN PROCESS Vent 000006 SPR000557 EID714469